hp 4535 graphics driver from their site for win 7 wont intall

[Govan_]

i changed the os from windows 8 back to 7 my notebook hp4535 s iahve tried to download the driver from their site whichis 400mb when i try to istall it says the content of this file caanot be unpacked the executable you are attemptig to run corrupted i ahev tried downloading severaly from differen computers but its the same please help

 

[rgd1101]

it said the file it corrupted? is your hdd failing? ram?
was the a reason you change the os from windows 8 back to 7?